Fake Weather Delay: CMU will delay operations until 11 a.m. Dec. 10

CMU is delaying operations on its main campus and CMU North building in Mount Pleasant today, Wednesday, Dec. 10, due to weather. 
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Morgan Jowett

Morgan Jowett and Dr. Anthony Chappez research Investigating Rhenium Systems in a Modern Analogue of the Proterozoic Ocean; Advancing the Paleo Redox Proxy during the McNair Research Institute 2025.
Mentor: Dr. Anthony Chappez
Research:  Refining the Use of Rhenium as a Paleo-Redox Proxy by Analyzing its Enrichment Factor in Relation to Burial and Diagenesis

In this study, we explore Re geochemistry at the sediment-water interface (SWI) of the Lake Huron Middle Island Sinkhole (MIS), a 23 m deep karst feature with low-oxygen bottom waters. There is a unique feature of the MIS takes place on the floor of the sinkhole, where groundwater seeps up from the ground, creating a thin layer of an anoxic and sulfate rich environment on the bottom. In 2024, a short core sediment and porewater samples were collected. All sediments were analysis for major, minor and trace element concentrations via ICP-MS.. We will present the sedimentary and porewater profiles for the MIS and discuss potential reactions involved during Re fixation. Our new insights will contribute to refine the use of Re as a paleo-redox proxy.